This sketch will read the long in EEPROM address 0.

EEPROM-Reader.ino

// This sketch will read the long in EEPROM address 0.
// Written by Peter Dalmaris from Tech Explorations.
// Used to find out how long an ESP32 can last on a LiPo battery.
// https://techexplorations.com

#include "EEPROM.h"

int addr = 0;
#define EEPROM_SIZE 32


void setup() {
    Serial.begin(115200);
  Serial.println("start...");
  if (!EEPROM.begin(EEPROM_SIZE))
  {
    Serial.println("failed to initialise EEPROM"); delay(1000000);
  }
  Serial.println(" bytes read from Flash . Count is:");
  long count = EEPROM.readLong(addr);

  Serial.print(count); 
  Serial.print(" ");
  
  
  Serial.println();

}

void loop() {

}